Nells



DAVTD V.VRANNELLS, OF WASHINGTON, KENTUCKY.

MILL FOR SAWING STONE.

Specification' of Letters Patent No. 1,487, dated 'February 8, 1840.

To aZZ 'whom it may concem Be it known that I, DAVID VANCE RAN- NnLLs, of Washington, in the county of Mason and State of Kentucky, have in- Vented certain new and useful Machinery for Sawing Stone, both Square and Round; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings of the same, making part of this specifioation.

The nature of my invention consists in a certain new and useful combination of mechanical principles forming a machine for sawing rectangular pieces of stone or marble, more or less in number, from one, two, or more blocks, wherein the blades for sawing are placed in gangs parallel to each other on each side of a stationary frame in which there moves longitudinally another frame on rollers or on ways, which latter frame support-s the saw frame which not only has a vibratory motion for cutting the stone but also a Vertical descending movement in passing through the stone-moving backward or forward by steam or other power; also for cutting stone by means of an endless saw passing around pulleys which work loosely on stationary Vertical parallel rods and descend with 'the saws as they enter the stone. Likewise in cutting circular blocks of stone of any length by means of a circular band saw fixed to a Skeleton cylinder revolving over and around the blocks of stone to be cut which descends as the work progresses.

Figure 1, is a perspective view of the machine for sawing rectangular pieces of` stone. Fig. 2 is a perspective view of the machine for sawing with endless' descending saws. Fig. 3 is a Perspective view of the machine for sawing round pieces of stone. Fig. 4

is a perspective View of a machine for sawing circular columns of stone. Fig. 5, section of machine showing the rollers. 6, a section representing the Vertical rollers. Fig. 7, gearing of the machine for sawing columns. Fg. 8, circular saw of ditto.

Similar letters in the fig'ures refer to similar parts.

Fig.

This machine consists of several parts and isfintended to represent machinery which I have inv'ented, lst, for sawing stone square or straight with the perpetually revolving or endless saw. This consists of a principal driver, drum, pulley, or trundle head A,

Fig. 2, driven by any power at pleasure, and

moving the pulley B on eachside of it either by band or cog-wheel. The pulleys or drums B B are 12 inches or more in diameter. On

the lower end is fasteneda Smooth` sheet iron circular plate C extending beyond the peripheryof the pulley one half an inch to prevent the saw from sliding off the pulley-V also onl the upper side of the saw is an iron hoop D inch square driven on to the pulley to keep the saw from running up the pulley. The pulleys at the other end of 1the saw frame are of similar construction but are turned by the turning of the saw. l,The saw E 1s of hoop iron or steel 316 inch in thickness and 132- inch or more broad. The pulleys or drums B1 a re from two to three feet in height and run on turned cylindrical iron shafts E of from 5 to 7 yfeet long and from 2%; to 5 inchesin diameter and thesaws are fed by the weight sliding.

square frame J ,Figz` 4,f consisting of sillsand four strong upright posts more than twice the heightvof the pillar's. These `posts are framed together with broad timber V,a little above the middle and at the top and into the sills below; from the center of the upper end of the pillar tobe cut extendsy to the upper end of the frame a turned shaft K at least 3 inches in diameter and from the middle 'cross timbers to thesills below are fixed 3 similar turned shafts.

The saw L Figs.` and is a perfectV cylinder Vof thin sheetiron some twelve 4inches broadl and beveled out or flared at the upper edge 'some inch v`of'*it,say Tag of an inch or a littlemore; :Onqthis beveled or fiaredfipartis to be fittedan iron'hoop Mof an inch broad and of' an inchin thickness. On this hoo Vare fastened say 5 iron bars N 1-1- inch roadand ofan nch thick with screws and taps (the hea'ds inside and countersunk) and these bars areftoiextend up nearly to the top of the frame and there to be firmly fastenedon the flower end of a.

pulley or cog Wheel O, which Wheel is driven in all respects-asthe pulleys of the revolvingsaws &c. turn around andiasfitf'cutsand slides down the shaft K first mentioned as afiixed in the top of the pillar.:

Immediately below-the hoop first Vmentioned as fastened Vto the upper edge of the saw must be fastened another hoop of'some inch square around which' is to be fixed a grooved wheel with 3 iron arms extending out to the three turned shafts mentioned,

having holes in the ends of the arm to go' on these shafts, down which they'will slide and guide the saw as the cuttingproceeds in its descending progress alongthe -pillar.

The single shaft above will direct and keep in place the cog-wheel or pulley which is connected with the moving power above.

Machinery for sawing straight or square stone with a combinationofstraight saws.

This consists of an oblong frame P-Fig. 1 of any requisite length,.'breadth-and height, say 10 feet long 4.01* 5 feet wide and of the same height with strong smoothcorner pillars U Fig.. l extending about 4 Vor 5 feet above the rest of the frame. vIn the bot-tom of this Vframe and close on the insideare fixed rollers V Fig. V5 or slide cogs (as shall 'be found most practically useful) on which rollers (or cogs) is laid a frame Q,-Fig. 1

of strength proportionedto the work to be carried and moved and some 3 or 4 Afeet longer than the lfirst frame.f Into this in-the middle of its 'side timbers (and at'the ends if necessary to prevent toppling) are to be firmlyfixed parallel lturned guide shafts Rof two, three, or. even five inches in diameter extending perpendicularly upward through' the lower and upper sills of the saw frame to the height of thercorner posts andif nec- I" essarythere may be arranged several wooden grooved fender posts S opposite the turned shaft. To the end of this frame a crankand pitmansuchlasseen in F ig. 6 at a are appliediV Directly-on this frame and of thesame length or a little longer 'if necessary is laid the saw frame Ti 11 or 5. feet height, the turned shafts passing perpendicularly through both'upper and lower sillsof this frame for the purpose of guiding its` descent as the Asawing progresses.

At each side off` each saw ,oflboth kinds vthey having also' the v effect of in` their longitudinaljmotions., r 2. The method of feeding the belt or endthatV is both thestraight and belt sawsthere are to be attached to' the head block a gang ofvertical rollers such as are seen at W Figs.. 6`` and 2 to secure' a fair unwavering cut 'of' the saw and be the meansf of rolling out any littlepioks which the saw may have received from gravel,&c., in vits transit. i These rollers-are to be at least one inch in diameter and to turn freely on pivots at each end.

Their length willbe determined by'the size of'lthe stonef'intended to be sawed. And it wis-also evident that thelengtha'nd height of the machinery length of the saws, &c., must be--adapted tothe lengthand thickness of the blocksintended to be cut up' by' it.` My

A stillmore simple mode ofsawing square stone by gang saws driven by any kind of l power at pleasure consists in having them setina plain saw frame such as'the other 1 gang saw frame without any superincum-` bent frame `or machlnery but guided entirely in its descent by the application of turned rollers and -moved by` a double or Vjointed pitman 'acting in a grooved block `which pitman block is elevated or depressedgby an elevating screw placed at each corner of vt-he pitman block so as ``to keep the pitman block `at all times nearlyon a level with the descent of the saws in their progress through the stone. ASee Fig. 6; v v s I do notlclaim asfmy invention the gang of saws, thelbelt, or endless saws, nor the hoop or cylinder saw as myl invention, as

they have longisince been usedfor cutting `lvarious materials; nor `dol claim the use of rollers Vsimply for the purpose of guiding the saws in their longitudinal motions'; but,

VVhat I do claim asmyinvention and im- Vprovements and which I desire'to secure by Letters Patent is-- i y a 1 i 1. The 4employrnent v of sets 'of rollers placed on eachsideof the straight and belt or endless saws and 'at each endvof the block of stone so arranged (as herein described) as to guide the saws `in their rise and fall guiding them less sawsby allowing the drums B, B, B, B,

spindlesF, F, F, F as herein described, the

drums beingworke either 4by cog whcels as Vdescribed or by belts. V f v v around which they revolve to slide on their` 8. The method of feedng the hoop or cylsaws fixed to a Skeleton frame having simulnder saws by lallowng the drum or hub to taneously a rotary and a Vertical motion as ,which it is at-tached to slide up and down herein described.

,qui on the spndle around which it rotates as DAVID V. RANNELLS.

5 heren described. VVtnesses:

4:. The method of sawng round blocks of WM. P. ELLIOT, stone or columns by means of cylndrcal EDMUND MAHER. 

